+86 187 5314 1157
+86 187 5314 1157
| No. | Property | unit | value |
| 1 | Specific gravity | g/cm³ | 1.19 |
| 2 | Water absorption (24HRS) | % | 0.30 |
| 3 | Sight transmittance (fullrays) | % | 93 |
| 4 | Refractive index | - | 1.49 |
| 5 | Shear strength | MPa | 64 |
| 6 | Tensile strength | MPa | 75 |
| 7 | Tensile strain at break | % | 4.5 |
| 8 | Flexural strength | MPa | 120 |
| 9 | Charpy unnotched impact strehgth | KJ/㎡ | 17 |
| 10 | Rockwell hardness(M) | - | 100 |
| 11 | Temperature of deflection under load | ℃ | 95 |
| 12 | Vicat softening temperature | ℃ | 105 |
| 13 | Thermal forming temperature | ℃ | 140-180 |
| 14 | Coefficient of linear thermal expansion | cm/cm/℃ | 6*10-5 |
| 15 | Dielectrlc strength | Kv/mm | 20 |
Comparison of physical properties of PMMA with other materials
| Material | Elastic strength(kg/c㎡) | Temperature of deflection(℃) | Sight transmittance (%) | Hardness (M) |
| PMMA | 900-1330 | 74-103 | 93-95 | 85-105 |
| PS | 560-980 | 65-104 | 89 | 65-80 |
| AS | 980-1330 | 88-104 | 87 | 80-90 |
| PC | 95 | 130-141 | 87 | 75-85 |
| PVC | 700-1120 | 66-77 | 84 |
Thickness Tolerance
| Sheet thickness | Objective Tolerance | Best quality Products | A Grade | Qualifed Products |
| (mm) | (mm) | Allowed Tolerance (mm) | Allowed Tolerance (mm) | Allowed Tolerance (mm) |
| 1.8-2.5 | +/-0.2 | +/-0.2 | +/-0.2 | +/-0.3 |
| 3.0-4.0 | +/-0.2 | +/-0.2 | +/-0.3 | +/-0.4 |
| 5.0-6.0 | +/-0.3 | +/-0.3 | +/-0.4 | +/-0.6 |
| 8.0-9.0 | +/-0.3 | +/-0.4 | +/-0.6 | +/-0.8 |
| 10-12 | +/-0.5 | +/-0.6 | +/-0.8 | +/-0.9 |
| 15 | +/-0.7 | +/-0.8 | +/-1.0 | +/-1.2 |
| 18-20 | +/-0.8 | +/-1.5 | +/-1.8 | +/-2.0 |
| 25 | +/-1.5 | +/-2.0 | +/-2.2 | +/-2.5 |
| 30 | +/-2.0 | +/-2.7 | +/-3.0 | +/-3.2 |
| 40 | +/-2.3 | +/-3.0 | +/-4.0 | +/-4.5 |
| 50 | +/-2.5 | +/-4.0 | +/-5.0 | +/-5.5 |
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